I need help on question 2 from period one and question 1 & 2 from period 2 pleas

Question

I need help on question 2 from period one and question 1 & 2 from period 2 please explain how you got the answer I want to do well on my midterm also I have attach the equations given in the book

1. Consider the coordination compound [Crcia(H.O)alci 2H,0. 0What is the complex in the coordination compound and what is the charge in the complexion? Gio Identify the oxidation number and coordination number of chromium (ii)ldentify the in the complex 2 Calculate the number of moles of oxalate ion in 5.0 mL of 1.0 M H,ceo 3. In your notebook, prepare lists of the tasks that need to be carried out in the synthesis and the analysis, and a time-line on how they should be performed Period 2 1. write the balanced redox half reactions that lead to equation 2 on p. 2 above. Identify which half reaction is an oxidation, and which is the reduction. FDTAisa very common ligand, which like oxalate, binds to many metals. However, unlike oxalate, which forms two bonds, EDTA forms 6 bonds to the metal. A 0.2481g sample of marble was dissolved in 100 mL, and a 10.00 mL aliquot of the solution was ti What is the molecular weight of the marble?

Explanation / Answer

H2C2O4 ® 2H+ + C2O42-

1 mol of oxalic acid gives 1 mole oxalate ion

Hence number of moles of oxalate = number of moles of oxalic acid

Moles of H2C2O4 in 5 ml = concentration x volume = 1 mol/L x 0.005 L = 0.005 moles
Moles of C2O42-= Moles of H2C2O4 = 0.005 mole

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